[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.175' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   54.514992][ T8448] syz-executor623 uses obsolete (PF_INET,SOCK_PACKET)
[   60.480578][ T8447] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff88810cf9cd00 (size 232):
  comm "syz-executor623", pid 8448, jiffies 4294942726 (age 7.980s)
  hex dump (first 32 bytes):
    a0 3c 04 0d 81 88 ff ff a0 3c 04 0d 81 88 ff ff  .<.......<......
    00 c0 17 08 81 88 ff ff 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000237f8f52>] __alloc_skb+0x6d/0x280
    [<00000000650b9cac>] __napi_alloc_skb+0x67/0x170
    [<00000000a4d91d87>] napi_get_frags+0x3c/0x80
    [<00000000e036a7dd>] tun_get_user+0xfda/0x1b40
    [<00000000aa4fd32c>] tun_chr_write_iter+0x84/0xe0
    [<00000000e0fa92fd>] new_sync_write+0x1d7/0x2b0
    [<00000000d5ffd63f>] vfs_write+0x34c/0x400
    [<000000009409d3d7>] ksys_write+0x9d/0x160
    [<00000000d2540891>] do_syscall_64+0x2d/0x70
    [<00000000d337f6f5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9